$\Psi$-Epistemic Quantum Cosmology?

TL;DR

This paper proposes a new $ ext{ extbackslash Psi}$-epistemic framework for quantum cosmology aiming to resolve measurement issues and clarify probability and evolution in the universe's quantum description.

Contribution

It introduces a novel $ ext{ extbackslash Psi}$-epistemic approach to quantum cosmology, integrating recent theories on time, hidden variables, and the arrow of time.

Findings

Potential resolution of the cosmological measurement problem

A new perspective on probability in quantum cosmology

Identification of future research directions

Abstract

This paper provides a prospectus for a new way of thinking about the wavefunction of the universe: a $\Psi$-epistemic quantum cosmology. We present a proposal that, if successfully implemented, would resolve the cosmological measurement problem and simultaneously allow us to think sensibly about probability and evolution in quantum cosmology. Our analysis draws upon recent work on the problem of time in quantum gravity, upon causally-symmetric local hidden variable theories, and upon a dynamical origin for the cosmological arrow of time. Our conclusion weighs the strengths and weaknesses of the approach and points towards paths for future development.